package main

import "fmt"

func adder() func(int)int{
	sum:=0
	return func(x int)int{
		sum+=x
		return sum
	}
}

func main() {
	pos,neg:=adder(),adder()
	for i:=0;i<10;i++{
		fmt.Println(i,pos(i),neg(-2*i))
	}
}